Ydj-w thermal expansion monitor

Ydj-w thermal expansion monitor

Ydj-w thermal expansion monitor is a set of highly reliable monitoring and protection instruments, equipped with linear differential transformer displacement sensor (LVDT), which is used to measure the valve position (hydraulic motor stroke) of rotating machinery and oil level of oil tank, and has local indication and remote transmission functions. Td-2 displacement monitor is specially designed and manufactured for measuring the expansion of steam turbine cylinder.

Main functions

Monitoring and protection of cylinder expansion of rotating machinery such as steam turbine, water turbine, compressor and blower.

Function Description:

1. Display function

The measured value of thermal expansion stroke, i-value alarm and ii-value alarm set value can be displayed on the LED nixie tube respectively, and the 4-digit nixie tube display is the symbol bit.

2. Alarm function

It is equipped with two-level alarm, and the user can set the alarm value as required. When the thermal expansion stroke exceeds the alarm set value, the corresponding alarm indicator on the front panel is on, and the monitor outputs the switch signal on the rear panel to protect the controlled equipment.

3. Alarm delay time setting function

The adjustment range of alarm delay time is 0 ~ 3 seconds to prevent false alarm caused by on-site interference.

4. Self diagnosis function

It has power on and power off detection functions, and cuts off the alarm and shutdown output circuit at the same time, which can effectively suppress the false alarm of the instrument.

5. Current output

It is equipped with 4 ~ 20mA current output interface, which can be connected with computer, DCS, PLC system, paperless recorder and other equipment.

Technical parameters:

1. Input signal: td-2 thermal expansion sensor output signal

2. Display mode: 4-digit nixie tube display, symbol bit, accuracy: ± 0.5%

3. Measurement range: 0 ~ 50mm

4. Current output: 4 ~ 20mA or 0 ~ 10mA, load ≤ 500 Ω

5. Alarm contact capacity: AC220V / 3a, dc28v / 3A

6. Working environment: temperature: 0 ~ 55 ℃, relative humidity: ≤ 95%

7. Working power supply: AC 220VAC ± 10% 50Hz power consumption ≤ 10W

8. Installation method: disc

9. Overall dimension: 160 (width) × 80 (high) × 200 (deep) mm

10. Opening size: 152 (width) × 75 (height) mm

Ordering Guide:

1. Ydj-w thermal expansion stroke monitor is equipped with td-2 thermal expansion sensor

2. Model selection code:

YDJ-W—A□□—B□□—C□□—D□□

8200/071/072—A□□—B□□—C□□—D□□

Range selection a □□:

0 1—— 0～25mm

0 2—— 0～35mm

0 3—— 0～50mm

Current output B □□:

0 1—— 4～20mA

0 2—— 0～10mA

Sensor selection C □□:

0 1 - td-2 thermal expansion sensor

Alarm delay D □□:

0 1 -- 0.1 second

0 2 - 1 second

0-3 seconds